/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.dxf2.geojson;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Nonnull;
import lombok.Getter;
import org.hisp.dhis.dxf2.importsummary.ImportConflict;
import org.hisp.dhis.dxf2.importsummary.ImportConflicts;
import org.hisp.dhis.dxf2.importsummary.ImportCount;
import org.hisp.dhis.dxf2.importsummary.ImportStatus;
import org.hisp.dhis.webmessage.WebMessageResponse;

/**
 * Tracks the conflicts during import of GeoJSON data.
 *
 * @author Jan Bernitt
 */
public final class GeoJsonImportReport implements ImportConflicts, WebMessageResponse {
  @Getter @JsonProperty private final ImportCount importCount;

  /**
   * Number of total conflicts. In contrast to the collection of {@link ImportConflict}s which
   * deduplicate this variable counts each conflict added.
   */
  @JsonProperty private int totalConflictOccurrenceCount = 0;

  private final Map<String, ImportConflict> conflicts;

  public GeoJsonImportReport() {
    this(new ImportCount(), 0, List.of());
  }

  /** Only for deserialisation (when using redis) */
  @JsonCreator
  public GeoJsonImportReport(
      @JsonProperty("importCount") ImportCount importCount,
      @JsonProperty("totalConflictOccurrenceCount") int totalConflictOccurrenceCount,
      @JsonProperty("conflicts") List<ImportConflict> conflicts) {
    this.importCount = importCount;
    this.conflicts = new LinkedHashMap<>();
    conflicts.forEach(this::addConflict);
    // OBS! setting the total count has to be after adding the conflicts
    this.totalConflictOccurrenceCount = totalConflictOccurrenceCount;
  }

  @Nonnull
  @Override
  public Class<? extends WebMessageResponse> getResponseClassType() {
    return GeoJsonImportReport.class;
  }

  @JsonProperty
  public ImportStatus getStatus() {
    int ignored = importCount.getIgnored();
    if (ignored == 0 && totalConflictOccurrenceCount == 0) {
      return ImportStatus.SUCCESS;
    }
    int imported = importCount.getImported();
    int updated = importCount.getUpdated();
    return imported + updated == 0 ? ImportStatus.ERROR : ImportStatus.WARNING;
  }

  @Override
  @JsonProperty
  public Iterable<ImportConflict> getConflicts() {
    return conflicts.values();
  }

  @Override
  public void addConflict(ImportConflict conflict) {
    totalConflictOccurrenceCount++;
    conflicts.compute(
        conflict.getGroupingKey(),
        (key, aggregate) -> aggregate == null ? conflict : aggregate.mergeWith(conflict));
  }

  @Override
  public String getConflictsDescription() {
    return conflicts.toString();
  }

  @Override
  public int getConflictCount() {
    return conflicts.size();
  }

  @Override
  public int getTotalConflictOccurrenceCount() {
    return totalConflictOccurrenceCount;
  }

  @Override
  public String toString() {
    return importCount + "\n" + conflicts;
  }
}
